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Merge lld trunk r338150, and resolve conflicts.
[FreeBSD/FreeBSD.git] / contrib / llvm / tools / lldb / source / Commands / CommandObjectApropos.cpp
1 //===-- CommandObjectApropos.cpp ---------------------------------*- C++
2 //-*-===//
3 //
4 //                     The LLVM Compiler Infrastructure
5 //
6 // This file is distributed under the University of Illinois Open Source
7 // License. See LICENSE.TXT for details.
8 //
9 //===----------------------------------------------------------------------===//
10
11 // C Includes
12 // C++ Includes
13 // Other libraries and framework includes
14 // Project includes
15 #include "CommandObjectApropos.h"
16 #include "lldb/Interpreter/Args.h"
17 #include "lldb/Interpreter/CommandInterpreter.h"
18 #include "lldb/Interpreter/CommandReturnObject.h"
19 #include "lldb/Interpreter/Options.h"
20 #include "lldb/Interpreter/Property.h"
21
22 using namespace lldb;
23 using namespace lldb_private;
24
25 //-------------------------------------------------------------------------
26 // CommandObjectApropos
27 //-------------------------------------------------------------------------
28
29 CommandObjectApropos::CommandObjectApropos(CommandInterpreter &interpreter)
30     : CommandObjectParsed(
31           interpreter, "apropos",
32           "List debugger commands related to a word or subject.", nullptr) {
33   CommandArgumentEntry arg;
34   CommandArgumentData search_word_arg;
35
36   // Define the first (and only) variant of this arg.
37   search_word_arg.arg_type = eArgTypeSearchWord;
38   search_word_arg.arg_repetition = eArgRepeatPlain;
39
40   // There is only one variant this argument could be; put it into the argument
41   // entry.
42   arg.push_back(search_word_arg);
43
44   // Push the data for the first argument into the m_arguments vector.
45   m_arguments.push_back(arg);
46 }
47
48 CommandObjectApropos::~CommandObjectApropos() = default;
49
50 bool CommandObjectApropos::DoExecute(Args &args, CommandReturnObject &result) {
51   const size_t argc = args.GetArgumentCount();
52
53   if (argc == 1) {
54     auto search_word = args[0].ref;
55     if (!search_word.empty()) {
56       // The bulk of the work must be done inside the Command Interpreter, since
57       // the command dictionary is private.
58       StringList commands_found;
59       StringList commands_help;
60
61       m_interpreter.FindCommandsForApropos(search_word, commands_found,
62                                            commands_help, true, true, true);
63
64       if (commands_found.GetSize() == 0) {
65         result.AppendMessageWithFormat("No commands found pertaining to '%s'. "
66                                        "Try 'help' to see a complete list of "
67                                        "debugger commands.\n",
68                                        args[0].c_str());
69       } else {
70         if (commands_found.GetSize() > 0) {
71           result.AppendMessageWithFormat(
72               "The following commands may relate to '%s':\n", args[0].c_str());
73           size_t max_len = 0;
74
75           for (size_t i = 0; i < commands_found.GetSize(); ++i) {
76             size_t len = strlen(commands_found.GetStringAtIndex(i));
77             if (len > max_len)
78               max_len = len;
79           }
80
81           for (size_t i = 0; i < commands_found.GetSize(); ++i)
82             m_interpreter.OutputFormattedHelpText(
83                 result.GetOutputStream(), commands_found.GetStringAtIndex(i),
84                 "--", commands_help.GetStringAtIndex(i), max_len);
85         }
86       }
87
88       std::vector<const Property *> properties;
89       const size_t num_properties =
90           m_interpreter.GetDebugger().Apropos(search_word, properties);
91       if (num_properties) {
92         const bool dump_qualified_name = true;
93         result.AppendMessageWithFormatv(
94             "\nThe following settings variables may relate to '{0}': \n\n",
95             args[0].ref);
96         for (size_t i = 0; i < num_properties; ++i)
97           properties[i]->DumpDescription(
98               m_interpreter, result.GetOutputStream(), 0, dump_qualified_name);
99       }
100
101       result.SetStatus(eReturnStatusSuccessFinishNoResult);
102     } else {
103       result.AppendError("'' is not a valid search word.\n");
104       result.SetStatus(eReturnStatusFailed);
105     }
106   } else {
107     result.AppendError("'apropos' must be called with exactly one argument.\n");
108     result.SetStatus(eReturnStatusFailed);
109   }
110
111   return result.Succeeded();
112 }